如何注册flask的自定义http状态码？

from flask import Flask, abort, make_response
from werkzeug.exceptions import HTTPException

class CustomException(HTTPException):
    code = 444
    description = "Custom HTTP status code 444 - Custom Description"

app = Flask(__name__)

@app.errorhandler(CustomException)
def handle_custom_exception(error):
    response = make_response(error.description, error.code)
    return response

@app.route('/')
def home():
    abort(444)  # 触发自定义异常

if __name__ == '__main__':
    app.run()